Omron V680 Series - Host Device Communications Check Flowchart

254
Troubleshooting Flowcharts
Section 9
RFID System
User's Manual
(Modbus TCP)
Section 9
Troubleshooting
Host Device Communications Check Flowchart
START
Is there a response?
No
Yes
Exception
code = 01 hex?
Is the connector
wiring OK?
Yes
Are the network
settings OK?
Correct the connector
wiring.
Correct the settings.
Yes
Is the query
frame correct?
Send the correct frame.
No
Yes
Is the data specified
in the query correct?
Send the correct data.
No
Yes
Is the Reader/Writer
busy?
Send the query when
the Reader/Writer can
perform processing.
Is the host device
operating normally?
Replace the Reader/Writer.
Correct the host device
program or replace the
host device.
OK
No Yes
No No
No
No
Yes
Yes
Yes
Yes
No
No
Exception
code = 02 or 03 hex?
Exception
code = 06 hex?